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Method for measuring content of Al, Ti and Ca in low-carbon silicon iron

A calcium content, carbon silicon technology, applied in the field of determination of aluminum titanium calcium content in low-carbon ferrosilicon, can solve the problems of long analysis cycle, chemical pollution, etc., and achieve the effect of cumbersome steps

Inactive Publication Date: 2010-06-23
ANGANG STEEL CO LTD
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Problems solved by technology

[0004] The above-mentioned chemical analysis method has a long analysis cycle, and the chemicals used have certain pollution to the environment.

Method used

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  • Method for measuring content of Al, Ti and Ca in low-carbon silicon iron
  • Method for measuring content of Al, Ti and Ca in low-carbon silicon iron

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Embodiment Construction

[0009] A method for measuring the content of aluminum titanium calcium in low-carbon ferrosilicon, the method dissolves the sample with nitric acid and hydrofluoric acid, after perchloric acid fumes, add an appropriate amount of hydrochloric acid, heat to dissolve the salt; then dilute with water to With a certain volume, the atomized solution is introduced into the inductively coupled plasma atomic emission spectrometer, and the spectral line intensity of the element to be measured is measured; according to the spectral line intensity measured by the known concentration standard substance, the concentration of the corresponding element of the substance to be measured is obtained.

[0010] Specific examples are as follows:

[0011] 1. Reagents

[0012] 1.1 Hydrochloric acid (1:1 aqueous solution).

[0013] 1.2 Nitric acid (ρ1.42g / mL).

[0014] 1.3 Hydrofluoric acid (ρ1.13g / mL).

[0015] 1.4 Perchloric acid (ρ1.67g / mL).

[0016] 1.5 NaOH (10% aqueous solution)

[0017] 1.6...

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Abstract

The invention relates to a method for measuring the content of Al, Ti and Ca in low-carbon silicon iron, which comprises the following steps: dissolving a sample through a nitric acid and a hydrofluoric acid, after fuming the sample through a perchloric acid, adding a proper amount of hydrochloric acid, and heating to dissolve a salt; diluting to a certain volume with water; introducing atomization solution into an inductively coupled plasma atomic emission spectrometer; measuring the intensity of a spectral line to be tested; and calculating the concentration of a corresponding element of the substance to be tested according to the intensity of the spectral line which is measured by the standard substance at known concentration. The method has the advantages of capacity of quickly and accurately analyzing the content of Al, Ti and Ca in the low-carbon silicon iron and no pollution.

Description

technical field [0001] The invention relates to the technical field of iron and steel metallurgical analysis, and relates to a method for measuring the content of aluminum, titanium and calcium in low-carbon ferrosilicon. Background technique [0002] Low-carbon ferrosilicon is a directional alloy additive for non-oriented silicon steel and grain-oriented silicon steel. In recent years, iron and steel enterprises have developed high-yield, high-efficiency alloy steel, special steel and purified molten steel, and have adopted high-purity ferroalloys to improve the cleanliness of cast billets. When added, so as to improve the steelmaking time and improve the recovery rate of elements. [0003] At present, the analysis of impurity elements in domestic low-carbon ferrosilicon usually adopts chemical analysis methods, including: GB / T4333.4 chrome azure S photometric method to determine the amount of aluminum in ferrosilicon alloy; GB / T4333.8 atomic absorption spectrometry There...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/73
Inventor 赵竞泽赵云霞单桂艳张健陈克仲
Owner ANGANG STEEL CO LTD
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